Not within the spec. Which was sort of the point I was (poorly) trying to make - that it's a huge caveat, but otherwise a decent fallback if and when that changes.
Google is adding an implementation into Messages, and it's honestly not a critical problem if OS vendors are supporting it at that level, but there's still too much we don't know about it imo. Will that be supported by iOS, if and when it supports RCS at all? Will it work for third-party clients, if and when Android gets APIs?
I'm not sure how much optimism I have that this will be anything other than a fragmented mess in the short term.
Google is adding an implementation into Messages, and it's honestly not a critical problem if OS vendors are supporting it at that level, but there's still too much we don't know about it imo. Will that be supported by iOS, if and when it supports RCS at all? Will it work for third-party clients, if and when Android gets APIs?
I'm not sure how much optimism I have that this will be anything other than a fragmented mess in the short term.